CN108092512A - A kind of multi-state high-gain multiport DC/DC converters - Google Patents
A kind of multi-state high-gain multiport DC/DC converters Download PDFInfo
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- CN108092512A CN108092512A CN201711311578.9A CN201711311578A CN108092512A CN 108092512 A CN108092512 A CN 108092512A CN 201711311578 A CN201711311578 A CN 201711311578A CN 108092512 A CN108092512 A CN 108092512A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A kind of multi-state high-gain multiport DC/DC converters, including：Sequentially connected input unit A, crisscross parallel and voltage doubling unit B and load unit C；Wherein input unit A includes at least one new energy micro battery upv, a batteries to store energy unit ub, diode VD2、VD3, switching tube S3、S4And S5；Crisscross parallel and voltage doubling unit B include two inductance L1And L2, two main circuit power switch tube Ss1And S2And by a diode VD2With a capacitance C1The voltage doubling unit of composition；Load unit C includes an output diode VDo, an output filter capacitor CoWith load R.Converter of the present invention can substantially reduce the electric energy conversion times between micro battery, accumulator and load compared to existing scheme, improve energy conversion efficiency, and can also realize that the input of N roads is expanded simultaneously.
Description
Technical field
The present invention relates to a kind of DC/DC converters, are specifically a kind of multi-state high-gain multiport DC/DC converters.
Background technology
With the getting worse of the global problems such as energy crisis, greenhouse effects and atmosphere pollution, photovoltaic generation, fuel electricity
The new energy power generation technologies such as pond power generation have obtained extensive concern and fast development, the grid-connected power generation system energy containing energy-storage units
The generated output of enough smooth new energy micro batteries, improves system power supply stability.Traditional mixed type multiport converter scheme
Middle new energy micro battery and energy-storage units are generally in parallel with dc bus by respective DC/DC converters, although this structure
It can solve energy-storage units balance micro battery generated output and improve the powered stable sex chromosome mosaicism of system, but due to using each
From DC/DC converters and dc bus parallel structure make that during each charge and discharge electricity of energy-storage system electric energy twice will be carried out to turn
It changes, causes waste of energy and the problems such as utilization rate of electrical is low, and parallel structure can also increase system design cost and control
The complexity of device design, in addition current multiport converter be all based on traditional Boost structure changes mostly and get,
It can seldom realize higher gain, the high-gain realized using coupling inductance is since there are the voltage and currents that leakage inductance causes switching tube
Stress is all larger.Therefore, existing parallel structure is improved for reducing energy-storage system energy conversion times, improving system capacity profit
With rate, reduction system design cost, Optimal Controller Design and realize that the low stress of high-gain and switching tube is of great significance.
The content of the invention
In view of the above shortcomings of the prior art, energy is converted caused by emphasis of the present invention solves energy-storage units parallel structure
Often, a kind of the problems such as capacity usage ratio is low and improves input and output voltage gain, it is proposed that multi-state high-gain multiport
DC/DC converters.The integrated of two-way DC/DC converters and high-gain DC/DC converters is realized, can send out new energy micro battery
Electric redundancy is directly stored by batteries to store energy unit, and in new energy micro battery generated output deficiency, accumulator can incite somebody to action
The electric energy of storage is released for load practicality, and the converter can substantially reduce micro battery, accumulator compared to existing scheme
And the electric energy conversion times between load, energy conversion efficiency is improved, and can also realize that the input of N roads is expanded simultaneously.
The technical solution that the present invention takes is：
A kind of multi-state high-gain multiport DC/DC converters, including sequentially connected input unit A, crisscross parallel and
Voltage doubling unit B, load unit C, internal connection relation are：
Unidirectional output port u in input unit ApvWith diode VD3After series connection with inductance L2Anode be connected, it is while single
To output port upvPass through switching tube S5With inductance L1It is connected, energy-storage units ubBy switching tube S4The discharge paths of composition are by opening
Close pipe S5With unidirectional output port upvParallel connection, switching tube S3Source electrode and energy-storage units ubAnode be connected, switching tube S3Drain electrode and two
Pole pipe VD2Cathode series connection, diode VD2Anode and inductance L2Negative terminal is connected, and forms the charging paths of accumulator；
Switching tube S in crisscross parallel and voltage doubling unit B1And S2Drain electrode respectively with inductance L1And L2Connection, switching tube S1With
S2Source electrode then with unidirectional output port upvWith energy-storage units ubCathode be connected, inductance L1、L2Respectively with C1With load unit C
In diode VD1It is in parallel again after series connection, then with output diode VDoAnode connection, diode VDoCathode connection
Capacitance CoWith load R；
Switching tube S1With switching tube S2As main circuit power switch pipe, using Interleaved control mode, i.e. control signal differs
180°。
In input unit A, switching tube S3With diode VD2And switching tube S4Respectively constitute accumulator charging paths and
Discharge paths, when micro battery power generation has redundancy, upvPass through diode VD3, inductance L2, diode VD2With switching tube S3To electric power storage
Pond is charged, at this time switching tube S4Shut-off, S5Conducting；When micro battery generation deficiency or larger bearing power, accumulator is by opening
Close pipe S4And L1Give capacitance C1It charges, while is load supplying, at this time switching tube S3、S5Shut-off, S4Conducting.
The converter works in four kinds of different states, is respectively：
(1) single-input double-output (Single input-dual output, SIDO) state：When photovoltaic cell capable of generating power have it is superfluous
Yu Shi, photovoltaic generation give load and storage battery power supply simultaneously, in this state：Switching tube S4It turns off always, S5It is constantly on, it opens
Close pipe S1、S2Output voltage is controlled, using Interleaved control mode, i.e. S1、S2Control signal duty cycle be more than 0.5, phase difference
180 °, switching tube S3Control the charging voltage of accumulator, switching tube S3Only in S2It is turned in turn off process, and S3ON time is small
In switching tube S2Turn-off time.
(2) lose-lose list enters output (Dual input-single output, DISO) state：When load power demand is more than
During photovoltaic cell capable of generating power amount, photovoltaic cell and accumulator powering load simultaneously, in this state：Switching tube S3、S5It closes always
It is disconnected, S4It is constantly on, diode VD3Conducting, VD2Shut-off, switching tube S1、S2Still using Interleaved control mode, upvAnd ubBy each
From switch controlled output voltage.
(3) list is defeated singly enters output (Single input-single output, DISO) state：When accumulator is fully charged,
Photovoltaic cell is individually for load supplying, in this state：Switching tube S3It turns off always, S4、S5It is constantly on, diode VD3、 VD2
It turns off always, switching tube S1、S2Using Interleaved control mode.
(4) list is defeated singly enters output (Single input-single output, DISO) state：When photovoltaic cell cannot be sent out
When electric, the independent powering load of accumulator, in this state：Switching tube S3、S4It turns off always, S5It is constantly on, diode VD3
Conducting, VD2Shut-off, switching tube S1、S2Using Interleaved control mode.
The converter can be as needed, expands the multiport conversion that the access of single channel energy-storage units is inputted for N roads new energy
Device.
Compared with prior art, a kind of multi-state high-gain multiport DC/DC converters of the present invention have following beneficial to effect
Fruit：
1. the structure of the invention by improving crisscross parallel high-gain DC/DC converters realizes the access of energy-storage units,
Pass through the discharge paths of a switch controlled energy-storage units, the charging of a switching tube and a diode control energy-storage units
Branch can realize the switching of more kinds of working conditions of SIDO, DISO, SISO simultaneously, and an electric energy conversion is realized between each port,
Energy conversion times are reduced, improve capacity usage ratio.
2. multi-state high-gain multiport DC/DC converters proposed by the present invention, using interleaving technique, pass through two poles
Pipe capacitance voltage-multiplying unit realizes input and output voltage high-gain simultaneously, reduces master power switch tube voltage current stress.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is multi-state high-gain multiport DC/DC converter principle figures of the present invention.
Fig. 2 is that schematic diagram is expanded on multi-state high-gain multiport DC/DC converter N roads of the present invention.
Specific embodiment
As shown in Figure 1, a kind of multi-state high-gain multiport DC/DC converters, by input unit A, crisscross parallel and again
Press unit B and load unit C compositions；The multi-state high-gain DC/DC converters include a unidirectional output port upv, one
A bidirectional port ubAnd load a R, switching tube S1、S2Output electricity is adjusted using Interleaved control mode for main circuit switch pipe
Pressure, S3And VD2For energy-storage units ubCharging paths, change charging voltage size, S by changing S3 duty cycles4For energy storage list
First ubDischarge paths, change S4Duty cycle size can control energy-storage units ubOutput power size, S5Coordinate to control the conversion
Device switches between several states.
The converter can work in different states according to varying environment condition and load supplying requirement：SIDO、SISO、
Tetra- kinds of states of DISO and SISO.
State (1)：When the power generation of new energy micro battery has redundancy：State lower switch pipe S4Shut-off, S always5It leads always
It is logical, switching tube S3Control energy-storage units ubCharging voltage, only in S2The time conducting of shut-off, and S3Duty cycle D3Less than 1-
D2, switching tube S1、S2Using Interleaved control mode its control signal phase is required to differ 180 °, respective duty cycle D1、D2It is all big
In 0.5, S1、S2Major control output voltage size.Mode one：Switching tube S1、S2Conducting, S3Shut-off, inductance L1、L2By micro battery
upvIt charges, diode VD1、VDoIt is turned off, R is by output capacitance C for loadoPower supply；Mode two：Switching tube S1、S3Conducting, S2It closes
It is disconnected, diode VD1、VDoIt is turned off, inductance L1It charges, L2Pass through diode VD2With switching tube S3It charges to accumulation power supply, load
Still by output capacitance CoPower supply；Mode three：Switching tube S1Conducting, S2、S3Shut-off, diode VD1Conducting, VDoShut-off, inductance L1It fills
Electricity, L2Pass through VD1Give capacitance C1It charges；Mode four：Switching tube S1、S3Shut-off, S2Conducting, diode VD1Shut-off, VDoConducting, electricity
Feel L2It charges, L1Pass through capacitance C1With diode VDoGive capacitance CoIt charges simultaneously as load supplying.
State (2)：When new energy micro battery generated energy abundance and energy-storage units charging complete, micro battery upvIndividually to negative
Carry power supply：State lower switch pipe S3、S4Shut-off, S always5It is constantly on, switching tube S1、S2Control respective duty cycle D1、 D2
To adjust output voltage size.Mode one：Switching tube S1、S2With conducting, inductance L1、L2By micro battery upvIt charges, diode VD1、
VDoIt is turned off, R is by output capacitance C for loadoPower supply；Mode two：Switching tube S1Conducting, S2Shut-off, diode VD1Conducting, VDoIt closes
It is disconnected, inductance L1It charges, L2Pass through VD1Give capacitance C1It charges；Mode three：Switching tube S1Shut-off, S2Conducting, diode VD1Shut-off,
VDoConducting, inductance L2It charges, L1Pass through capacitance C1With diode VDoGive capacitance CoIt charges simultaneously as load supplying.
State (3)：When new energy micro battery generated energy deficiency or larger load power demand, micro battery upvWith energy storage list
First ubPowering load simultaneously：State lower switch pipe S3、S5Shut-off, S always4It is constantly on, switching tube S1、S2Control each accounts for
Sky compares D1、D2To adjust output voltage size.Mode one：Switching tube S1、S2With conducting, inductance L1、L2Respectively by micro battery upvWith
ubIt charges, diode VD1、VDoIt is turned off, R is by output capacitance C for loadoPower supply；Mode two：Switching tube S1Conducting, S2Shut-off, two
Pole pipe VD1Conducting, VDoShut-off, inductance L1By upvIt charges, L2Pass through VD1Give capacitance C1It charges；Mode three：Switching tube S1Shut-off, S2
Conducting, diode VD1Shut-off, VDoConducting, ubGive inductance L2It charges, L1Pass through capacitance C1With diode VDoGive capacitance CoIt charges same
When be load supplying.
State (4)：When new energy micro battery cannot generate electricity, energy-storage units ubIndependent powering load：The state lower switch
Pipe S3Shut-off, S always5It is constantly on, due to ub>upv, diode VD3Shut-off, switching tube S1、S2Control respective duty cycle D1、 D2
To adjust output voltage size.Mode one：Switching tube S1、S2With conducting, inductance L1、L2By micro battery ubIt charges, diode VD1、
VDoIt is turned off, R is by output capacitance C for loadoPower supply；Mode two：Switching tube S1Conducting, S2Shut-off, diode VD1Conducting, VDoIt closes
It is disconnected, inductance L1It charges, L2Pass through VD1Give capacitance C1It charges；Mode three：Switching tube S1Shut-off, S2Conducting, diode VD1Shut-off,
VDoConducting, inductance L2It charges, L1Pass through capacitance C1With diode VDoGive capacitance CoIt charges simultaneously as load supplying.
In conclusion a kind of multi-state high-gain multiport DC/DC converters proposed by the present invention realize that energy-storage units connect
Enter, co-ordination and output voltage high-gain between energy-storage units and new energy micro battery.Pass through integrated form multiport DC/DC
It is low and be designed to the problems such as high that converter solves conventional parallel formula structural energy utilization rate, passes through diode capacitance multiplication units
It realizes input and output high-gain, reduces the voltage and current stress on master power switch pipe.The present invention is suitable for containing energy-storage units
Grid-connected power generation system, above-mentioned implementation example illustrates multi-state high-gain that is simple and building just for the sake of operation principle
DC/DC converters, in practical applications, can be slightly modified to this programme according to actual conditions, reaches optimization efficiency and saving
The purpose of cost.
The above-mentioned implementation example of the present invention is only example to illustrate the invention, and is not the reality to the present invention
Apply the restriction of mode.For those of ordinary skill in the art, other can also be made on the basis of the above description
Various forms of variations and variation.Here all embodiments can not be exhaustive.Every technical side for belonging to the present invention
Case changes and variations that derived from are still in the row of protection scope of the present invention.
Claims (4)
1. a kind of multi-state high-gain multiport DC/DC converters, it is characterised in that：Including sequentially connected input unit A, hand over
Wrong in parallel and voltage doubling unit B, load unit C, internal connection relation are：
Unidirectional output port u in input unit ApvWith diode VD3After series connection with inductance L2Anode be connected, it is while unidirectional defeated
Exit port upvPass through switching tube S5With inductance L1It is connected, energy-storage units ubBy switching tube S4Pass through switching tube S5With unidirectional output terminal
Mouth upvParallel connection, switching tube S3Source electrode and energy-storage units ubAnode be connected, switching tube S3Drain electrode and diode VD2Cathode series connection,
Diode VD2Anode and inductance L2Negative terminal is connected；
Switching tube S in crisscross parallel and voltage doubling unit B1And S2Drain electrode respectively with inductance L1And L2Connection, switching tube S1And S2's
Source electrode then with unidirectional output port upvWith energy-storage units ubCathode be connected, inductance L1、L2Respectively with C1In load unit C
Diode VD1It is in parallel again after series connection, then with output diode VDoAnode connection, diode VDoCathode connection capacitance
CoWith load R.
2. a kind of multi-state high-gain multiport DC/DC converters according to claim 1, it is characterised in that：Input unit A
In, switching tube S3With diode VD2And switching tube S4The charging paths and discharge paths of accumulator are respectively constituted, work as micro battery
When power generation has redundancy, upvPass through diode VD3, inductance L2, diode VD2With switching tube S3It charges a battery, at this time switching tube
S4Shut-off, S5Conducting；When micro battery generation deficiency or larger bearing power, accumulator passes through switching tube S4And L1Give capacitance C1
It charges, while is load supplying, at this time switching tube S3、S5Shut-off, S4Conducting.
3. a kind of multi-state high-gain multiport DC/DC converters according to claim 1, it is characterised in that：The converter
Four kinds of different states are worked in, are respectively：
(1) single-input double-output state：When photovoltaic cell capable of generating power has redundancy, photovoltaic generation supplies simultaneously to load and accumulator
Electricity, in this state：Switching tube S4It turns off always, S5It is constantly on, switching tube S1、S2Output voltage is controlled, using Interleaved control
Mode, i.e. S1、S2Control signal duty cycle be more than 0.5, phase differ 180 °, switching tube S3The charging voltage of accumulator is controlled,
Switching tube S3Only in S2It is turned in turn off process, and S3ON time is less than switching tube S2Turn-off time.
(2) lose-lose list enters output state：When load power demand is more than photovoltaic cell capable of generating power amount, photovoltaic cell and accumulator are same
When powering load, in this state：Switching tube S3、S5It turns off always, S4It is constantly on, diode VD3Conducting, VD2Shut-off, is opened
Close pipe S1、S2Still using Interleaved control mode, upvAnd ubPass through respective switch controlled output voltage.
(3) list is defeated singly enters output state：When accumulator is fully charged, photovoltaic cell is individually for load supplying, in this state：Switch
Pipe S3It turns off always, S4、S5It is constantly on, diode VD3、VD2It turns off always, switching tube S1、S2Using Interleaved control mode,.
(4) list is defeated singly enters output state：When photovoltaic cell cannot generate electricity, the independent powering load of accumulator, in this state：
Switching tube S3、S4It turns off always, S5It is constantly on, diode VD3Conducting, VD2Shut-off, switching tube S1、S2Using Interleaved control side
Formula.
4. a kind of multi-state high-gain multiport DC/DC converters as described in claim 1 or 2 or 3, it is characterised in that：For
Grid-connected power generation system containing energy-storage units.
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| CN201711311578.9A CN108092512B (en) | 2017-12-11 | 2017-12-11 | Multi-working-condition high-gain multi-port DC/DC converter |
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| CN108092512B CN108092512B (en) | 2020-06-09 |
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| CN109004829A (en) * | 2018-07-06 | 2018-12-14 | 天津大学 | A kind of low current ripple coupling inductance two-way DC converter |
| CN109245589A (en) * | 2018-10-10 | 2019-01-18 | 青岛大学 | Three port integrated inverse device of single-stage three-phase high gain boost type |
| CN109245590A (en) * | 2018-10-10 | 2019-01-18 | 青岛大学 | Three port integrated inverse device of single-stage and-phase high gain boost type |
| CN113890357A (en) * | 2021-09-10 | 2022-01-04 | 三峡大学 | Multi-working-condition high-gain three-port DC-DC converter based on Sepic |
| CN113890356A (en) * | 2021-09-10 | 2022-01-04 | 三峡大学 | Novel high-gain dual-input DC-DC converter |
| CN113890358A (en) * | 2021-09-10 | 2022-01-04 | 三峡大学 | Three-port high-reliability sepic DC-DC converter |
| CN113890359A (en) * | 2021-10-11 | 2022-01-04 | 三峡大学 | Three-port high-reliability cuk DC-DC converter |
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| CN114221546A (en) * | 2021-12-14 | 2022-03-22 | 国网福建省电力有限公司宁德供电公司 | Interleaved parallel high-gain Boost direct-current converter, control method and control device |
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| CN109004829A (en) * | 2018-07-06 | 2018-12-14 | 天津大学 | A kind of low current ripple coupling inductance two-way DC converter |
| CN109004829B (en) * | 2018-07-06 | 2020-12-01 | 天津大学 | Low-current ripple coupling inductance bidirectional direct current converter |
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| CN113890358B (en) * | 2021-09-10 | 2023-11-21 | 三峡大学 | Three-port high-reliability sepic DC-DC converter |
| CN113890356A (en) * | 2021-09-10 | 2022-01-04 | 三峡大学 | Novel high-gain dual-input DC-DC converter |
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| CN113890357A (en) * | 2021-09-10 | 2022-01-04 | 三峡大学 | Multi-working-condition high-gain three-port DC-DC converter based on Sepic |
| CN113890356B (en) * | 2021-09-10 | 2023-12-19 | 三峡大学 | Novel high-gain double-input DC-DC converter |
| CN113890359A (en) * | 2021-10-11 | 2022-01-04 | 三峡大学 | Three-port high-reliability cuk DC-DC converter |
| CN113965081A (en) * | 2021-10-11 | 2022-01-21 | 三峡大学 | Cuk-based multi-working-condition high-gain three-port DC-DC converter |
| CN113890359B (en) * | 2021-10-11 | 2023-10-27 | 三峡大学 | Three-port high-reliability cuk DC-DC converter |
| CN113965081B (en) * | 2021-10-11 | 2023-11-24 | 三峡大学 | Multi-working-condition high-gain three-port DC-DC converter based on Cuk |
| CN114221546A (en) * | 2021-12-14 | 2022-03-22 | 国网福建省电力有限公司宁德供电公司 | Interleaved parallel high-gain Boost direct-current converter, control method and control device |
| CN117254669A (en) * | 2023-11-14 | 2023-12-19 | 中山市宝利金电子有限公司 | Binary multiport converter based on switch coupling inductance |
| CN117254669B (en) * | 2023-11-14 | 2024-02-02 | 中山市宝利金电子有限公司 | Binary multiport converter based on switch coupling inductance |
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Application publication date: 20180529 Assignee: Yichang Yizhixing Technology Co.,Ltd. Assignor: CHINA THREE GORGES University Contract record no.: X2023980034895 Denomination of invention: A High Gain Multi Port DC/DC Converter with Multiple Operating Conditions Granted publication date: 20200609 License type: Common License Record date: 20230426 |
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